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消失するトーラス。
Disappearing Torus.
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#pragma once #include "ofMain.h" class ofApp : public ofBaseApp { public: void setup(); void update(); void draw(); void keyPressed(int key) {}; void keyReleased(int key) {}; void mouseMoved(int x, int y) {}; void mouseDragged(int x, int y, int button) {}; void mousePressed(int x, int y, int button) {}; void mouseReleased(int x, int y, int button) {}; void windowResized(int w, int h) {}; void dragEvent(ofDragInfo dragInfo) {}; void gotMessage(ofMessage msg) {}; glm::vec3 make_point(float R, float r, float u, float v); ofEasyCam cam; ofMesh face, line; }; |
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#include "ofApp.h" //-------------------------------------------------------------- void ofApp::setup() { ofSetFrameRate(30); ofSetWindowTitle("openFrameworks"); ofBackground(0); ofEnableDepthTest(); this->line.setMode(ofPrimitiveMode::OF_PRIMITIVE_LINES); } //-------------------------------------------------------------- void ofApp::update() { this->face.clear(); this->line.clear(); float phi_deg_step = 3; float theta_deg_step = 12; float R = 250; for (int base_r = 0; base_r <= 20; base_r += 3) { int r = (base_r + ofGetFrameNum() * 3) % 100; for (float phi_deg = 0; phi_deg < 360; phi_deg += phi_deg_step) { for (float theta_deg = 0; theta_deg < 360; theta_deg += theta_deg_step) { auto noise_value = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg, phi_deg) * 0.05, ofGetFrameNum() * 0.02)); if (noise_value < 0.475) { continue; } auto noise_1 = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg - theta_deg_step, phi_deg) * 0.05, ofGetFrameNum() * 0.02)); auto noise_2 = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg, phi_deg + phi_deg_step) * 0.05, ofGetFrameNum() * 0.02)); auto noise_3 = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg, phi_deg - phi_deg_step) * 0.05, ofGetFrameNum() * 0.02)); auto noise_4 = ofNoise(glm::vec4(this->make_point(R, R * 0.25, theta_deg + theta_deg_step, phi_deg) * 0.05, ofGetFrameNum() * 0.02)); auto index = this->face.getNumVertices(); vector<glm::vec3> vertices; vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg - theta_deg_step * 0.5, phi_deg - phi_deg_step * 0.5))); vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg + theta_deg_step * 0.5, phi_deg - phi_deg_step * 0.5))); vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg - theta_deg_step * 0.5, phi_deg + phi_deg_step * 0.5))); vertices.push_back(glm::vec3(this->make_point(R, r, theta_deg + theta_deg_step * 0.5, phi_deg + phi_deg_step * 0.5))); this->face.addVertices(vertices); this->face.addIndex(index + 0); this->face.addIndex(index + 1); this->face.addIndex(index + 3); this->face.addIndex(index + 0); this->face.addIndex(index + 3); this->face.addIndex(index + 2); auto alpha = 255; if (r >= 50) { alpha = ofMap(r, 50, 101, 255, 0); } alpha = ofMap(r, 0, 100, 255, 0); for (int i = 0; i < 4; i++) { this->face.addColor(ofColor(255, alpha)); } if (noise_1 < 0.475) { this->line.addVertex(vertices[0]); this->line.addVertex(vertices[2]); this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 2); this->line.addColor(ofColor(0, alpha)); this->line.addColor(ofColor(0, alpha)); } if (noise_2 < 0.475) { this->line.addVertex(vertices[2]); this->line.addVertex(vertices[3]); this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 2); this->line.addColor(ofColor(0, alpha)); this->line.addColor(ofColor(0, alpha)); } if (noise_3 < 0.475) { this->line.addVertex(vertices[0]); this->line.addVertex(vertices[1]); this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 2); this->line.addColor(ofColor(0, alpha)); this->line.addColor(ofColor(0, alpha)); } if (noise_4 < 0.475) { this->line.addVertex(vertices[1]); this->line.addVertex(vertices[3]); this->line.addIndex(this->line.getNumVertices() - 1); this->line.addIndex(this->line.getNumVertices() - 2); this->line.addColor(ofColor(0, alpha)); this->line.addColor(ofColor(0, alpha)); } } } } ofSeedRandom(39); } //-------------------------------------------------------------- void ofApp::draw() { this->cam.begin(); ofRotateY(ofGetFrameNum() * 1.8); ofRotateX(ofGetFrameNum() * 1.2); ofSetLineWidth(3); this->line.draw(); this->face.draw(); this->cam.end(); } //-------------------------------------------------------------- glm::vec3 ofApp::make_point(float R, float r, float u, float v) { // 数学デッサン教室 描いて楽しむ数学たち P.31 u *= DEG_TO_RAD; v *= DEG_TO_RAD; auto x = (R + r * cos(u)) * cos(v); auto y = (R + r * cos(u)) * sin(v); auto z = r * sin(u); return glm::vec3(x, y, z); } //-------------------------------------------------------------- int main() { ofSetupOpenGL(720, 720, OF_WINDOW); ofRunApp(new ofApp()); } |